Our take on a treacle tart, with the jaggery adding extra richness and sweetness to the dish. You can buy jaggery in most Indian and Western supermarkets, but if you don't have any you can use caster (superfine) sugar instead.
Note: If you don't have an ice cream maker, transfer the cooled liquid into a freezer container and put into the freezer for a couple of hours until it starts to solidify. Stir with a spatular to break up the ice crystals, then return it to the freezer. Repeat this process every 30 minutes until the mixture is set.